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    • 73. 发明授权
    • Duplexer
    • 双工器
    • US07755453B2
    • 2010-07-13
    • US11812514
    • 2007-06-19
    • Masafumi IwakiTokihiro NishiharaMasanori UedaGo Endo
    • Masafumi IwakiTokihiro NishiharaMasanori UedaGo Endo
    • H03H9/00H03H9/64
    • H03H9/706H03H9/0571
    • A duplexer includes an antenna terminal, a first filter connected to the antenna terminal, a second filter that has a passband at a high-frequency side of the first filter and is connected to the antenna terminal, and a resonance circuit that is connected between the second filter and the antenna terminal and includes a first inductor and a first capacitor connected in parallel. Assuming that a passband frequency of the first filter ranges from f1Low to f1High (f1Low˜f1High) and a passband frequency ranges from f2Low to f2High (f2Low˜f2High), the resonator has a resonance frequency fr satisfying: fr=(f2Low˜f2High)±(f1Low˜f1High), or fr=2(f1Low˜f1High)±(f2Low˜f2High).
    • 双工器包括天线端子,连接到天线端子的第一滤波器,在第一滤波器的高频侧具有通带并连接到天线端子的第二滤波器,以及连接在天线端子之间的谐振电路 第二滤波器和天线端子,并且包括并联连接的第一电感器和第一电容器。 假设第一滤波器的通带频率从f1到低(f1Low〜f1High)的范围,通带频率的范围从f2到高(f2Low〜f2High),谐振器的共振频率fr满足:fr =(f2Low〜f2High) ±(f1Low〜f1High)或fr = 2(f1Low〜f2高)±(f2Low〜f2高)。